<template>
  <div class="app-container">
    讲师列表

    <!--查询表单-->
    <el-form :inline="true" class="demo-form-inline">
      <el-form-item>
        <el-input v-model="courseQuery.title" placeholder="课程名称"/>
      </el-form-item>

      <el-form-item>
        <el-select v-model="courseQuery.status" clearable placeholder="课程状态">
          <el-option value="Normal" label="已发布"/>
          <el-option value="Draft" label="未发布"/>
          <!--坑 需要去掉 :value="Draft" 的冒号才不会报错-->
        </el-select>
      </el-form-item>


      <el-button type="primary" icon="el-icon-search" @click="getListCondition()">查询</el-button>
      <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>

    <!-- 表格 -->
    <el-table
      :data="list"
      border
      fit
      highlight-current-row>
      <el-table-column label="序号" width="70" align="center">
        <template slot-scope="scope">
          {{ (page - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>

      <el-table-column prop="title" label="名称" width="300" align="center"/>

      <el-table-column label="课程状态" width="200" align="center">
        <template slot-scope="scope">
          {{ scope.row.status==='Normal'?'已发布':'未发布' }}
        </template>
      </el-table-column>

      <el-table-column prop="lessonNum" label="课时数" align="center" />

      <el-table-column prop="gmtCreate" label="添加时间" width="300" align="center"/>

      <el-table-column prop="viewCount" label="浏览数量" width="60" />

      <el-table-column label="操作" width="200" align="center">
        <template slot-scope="scope">
          <router-link :to="'/course/info/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程基本信息</el-button>
          </router-link>
          <router-link :to="'/course/chapter/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程大纲</el-button>
          </router-link>

          <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeDataById(scope.row.id)">删除课程信息</el-button>
        </template>
      </el-table-column>

    </el-table>

    <!-- 分页 -->
    <el-pagination
      :current-page="page"
      :page-size="limit"
      :total="total"
      style="padding: 30px 0; text-align: center;"
      layout="total, prev, pager, next, jumper"
      @current-change="getListCondition"
    />
  </div>
</template>

<script>
import course from '@/api/edu/course'

export default {
  data(){ //定义变量的初始值
    return{
      list:null,
      page:1,
      limit:10,
      total:0,
      courseQuery:{
        status: ''
      },
      value:['Normal','Draft']
    }
  },

  created(){ //页面渲染执行之前，一般调用methods定义的方法
    this.getListCondition()
  },
  methods: {

    //课程列表方法, todo 自己完善
    // getList(){
    //   // var that = this //此处原来有坑，得这样定义才找得到
    //   course.getListCourse()
    //     .then(response=>{ //请求成功
    //       //response接口返回的数据
    //       this.list = response.data.list;
    //     })
    //     .catch(error=>{
    //       console.log(error);//请求失败
    //     })
    // },
    resetData(){
      //清空表单输入数据
      this.courseQuery = {}
      //重新查询
      this.getListCondition()
    },
    getListCondition(page = 1) {
      this.page = page
      course.getCoursePageList(this.page,this.limit,this.courseQuery)
      .then(response=>{
        this.list = response.data.rows
        this.total = response.data.total
      })
    },
    removeDataById(id){
      // alert(id)
      this.$confirm('此操作将永久删除课程记录, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        //调用删除方法
        course.removeCourseById(id)
          .then(response=>{
            //提示信息
            this.$message({
              type: 'success',
              message: '删除成功!'
            });
            //回到列表页面
            this.getListCondition()
          })
      })
    }
  }
}
</script>
